2023 Fiscal Year Final Research Report
New developments in the mechanism of acquisition of cerebral ischemic tolerance: intracellular molecular mechanisms and Interactions mediated by ATP receptors.
Project/Area Number |
19H03769
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 56010:Neurosurgery-related
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Research Institution | University of Yamanashi |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
小泉 修一 山梨大学, 大学院総合研究部, 教授 (10280752)
吉岡 秀幸 山梨大学, 大学院総合研究部, 准教授 (20402076)
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Project Period (FY) |
2019-04-01 – 2023-03-31
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Keywords | 脳梗塞 / 脳虚血耐性 / グリア細胞 / アストロサイド / ミクログリア |
Outline of Final Research Achievements |
Astrocyte-mediated ischemic tolerance has attracted much attention recently as a neuroprotective mechanism induced by ischemic preconditioning (IPC). The interaction between microglia and astrocytes is expected to play an important initiator; however, it has not been elucidated. We investigated whether pharmacological microglial depletion induced by a colony-stimulating factor 1 receptor (CSF1R) antagonist (PLX5622) could induce neuroprotective effects and astrocyte activation after preconditioning in a transient middle cerebral artery occlusion (MCAO) model mouse. We investigated whether pharmacological microglial depletion induced by antagonist (PLX5622) can induce neuroprotective effects and astrocyte activation after preconditioning. The results suggest that microglia inhibit proliferation of injurious astrocytes and contribute to the acquisition of tolerance in the astrocyte-induced ischemic tolerance phenomenon.
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Free Research Field |
脳虚血耐性
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Academic Significance and Societal Importance of the Research Achievements |
本研究では以下の重要な知見が明らかになった。 1)ミクログリアはpreconditioningによる虚血耐性現象誘導に必須である。2)ミクログリアはpreconditioningを感知し、アストロサイトを虚血抵抗性の表現型へ変化させる。3)ミクログリアは保護反応性アストロサイトを誘導するだけでなく、神経毒性表現型への変化も抑制する。 これらを総合すると、虚血耐性の誘導には、preconditioning時点でのミクログリアの存在と、それに続くミクログリア-アストロサイト相互連関が不可欠であると考えられた。
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